Chapter 2: Installation
2-19
Battery
JD1
FAN1
FAN2
FAN3
I-SA
TA4
I-SA
TA5
J1
J3
JPI2C1
JPW1
JSD1
JTPM1
VGA
LED8
LED3
LED7
JBT1
1
JOH1
JL1
JI2C1
JI2C2
JPK1
JWD1
JPG1
JIPMB1
COM2
COM1
JF1
USB 3.0-2
LAN3/4 LED
LAN2/LAN4
LAN1/LAN3
USB2.0-0/1
USB3.0-0/1
USB 3.0-3
IPMI_LAN
PCI-E 2.0 X8
DIMMA1
DIMMA2
DIMMB2
DIMMB1
I-SA
TA0
A1SAi/A1SRi Series Motherboard
Rev. 1.00
FP
CTRL
JPL1
BIOS
Marvell
PHY
BMC
Bar Code
JUIDB1
CPU
SP1
I-SA
TA2
I-SA
TA3
I-SA
TA1
LED2
2-6 Connecting Cables
This section provides brief descriptions and pin-out definitions for onboard headers
and connectors. Be sure to use the correct cable for each header or connector.
For information on back panel USB and Front Panel USB ports, refer to age 2-12.
A. 24-Pin ATX PWR
B. 4-Pin 12V DC Alternative
Power Source (up to 144W)
C. 4-Pin HDD PWR
ATX Power 24-pin Connector
Pin Definitions (JPW1)
Pin# Definition Pin # Definition
13
+3.3V
1
+3.3V
14
NC
2
+3.3V
15
COM
3
COM
16
PS_ON
4
+5V
17
COM
5
COM
18
COM
6
+5V
19
COM
7
COM
20
Res (NC)
8
PWR_OK
21
+5V
9
5VSB
22
+5V
10
+12V
23
+5V
11
+12V
24
COM
12
+3.3V
ATX PWR, DC PWR and HDD PWR
Connectors (JPW1, J1, J3)
The 24-pin ATX power connector header
(JPW1) is used to provide power to the
motherboard. The 4-pin DC Power con-
nector, located at J1, provides alternative
12V power source for space-restrained
enclosures such as SC101i when JPW1
is not in use. The 4-pin HDD Power
connector J3 provides power to onboard
HDD devices.
A
Note 1:
Do not use the 4-pin
DC power at J1 when the
24-pin ATX Power at JPW1 is
connected to the power supply.
B
C
1
4
2
3
1
4
12V DC Power
Pin Definitions (J1)
Pin# Definition
1-2
GND
3-4
12V
4-Pin HDD Power
Pin Definitions (J3)
Pin# Definition
1
12V
2-3
GND
4
5V
